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MAX1032_11 Datasheet, PDF (6/32 Pages) Maxim Integrated Products – 8- and 4-Channel, ±3 x VREF Multirange Inputs, Serial 14-Bit ADCs
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8- and 4-Channel, ±3 x VREF
Multirange Inputs, Serial 14-Bit ADCs
ELECTRICAL CHARACTERISTICS (continued)
(VAVDD1 = VAVDD2 = VDVDD = VDVDD0 = 5V, VAGND1 = VDGND = VDGNDO = VAGND2 = VAGND3 = 0V, fCLK = 3.5MHz (50% duty
cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input
range (±3 x VREF), CDOUT = 50pF, CSSTRB = 50pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
Note 1: Parameter tested at VAVDD1 = VAVDD2 = VDVDD = VDVDD0 = 5V.
Note 2: See definitions in the Parameter Definitions section at the end of the data sheet.
Note 3: Guaranteed by correlation with single-ended measurements.
Note 4: Not production tested. Guaranteed by design.
Note 5: To ensure external reference operation, VREFCAP must exceed (VAVDD1 - 0.1V). To ensure internal reference operation, VREFCAP
must be below (VAVDD1 - 0.4V). Bypassing REFCAP with a 0.1µF or larger capacitor to AGND1 sets VREFCAP ≈ 4.096V. The tran-
sition point between internal reference mode and external reference mode lies between the REFCAP buffer disable threshold
minimum and maximum values (Figures 17 and 18).
Note 6: The SCLK duty cycle can vary between 40% and 60%, as long as the tCL and tCH timing requirements are met.
Typical Operating Characteristics
(VAVDD1 = VAVDD2 = VDVDD = VDVDD0 = 5V, VAGND1 = VDGND = VDGNDO = VAGND2 = VAGND3 = 0V, fCLK = 3.5MHz (50% duty
cycle), external clock mode, VREF = 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input
range (±3 x VREF), CDOUT = 50pF, CSSTRB = 50pF; unless otherwise noted.)
ANALOG SUPPLY CURRENT
vs. ANALOG SUPPLY VOLTAGE
2.6
EXTERNAL CLOCK MODE
2.5
TA = +85°C
2.4
TA = +25°C
TA = -40°C
2.3
2.2
2.1
4.75 4.85 4.95 5.05 5.15 5.25
VAVDD1 (V)
PREAMPLIFIER SUPPLY CURRENT
vs. PREAMPLIFIER SUPPLY VOLTAGE
18
17
TA = +85°C
16
15
TA = +25°C
14
13
TA = -40°C
12
EXTERNAL CLOCK MODE
11
AIN1–AIN7 = AGND2
AIN0 = +FS
10
4.75 4.85 4.95 5.05 5.15 5.25
VAVDD2 (V)
DIGITAL SUPPLY CURRENT
vs. DIGITAL SUPPLY VOLTAGE
0.95
EXTERNAL CLOCK MODE
DATA RATE = 115ksps
0.90
0.85
TA = +85°C
TA = +25°C
0.80
TA = -40°C
0.75
4.75 4.85 4.95 5.05 5.15 5.25
VDVDD (V)
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